Very useful (super long) One Pager hosting a ton of beautiful color gradients by the team over at itmeo. Really dig how its all free with an upsell of a (PWYW) Sketch and Photoshop plugin. Smart. Also little shout out to the random Emoji success messages when you copy a gradient’s CSS to the clipboard. Lovely touch.
Do you often look for cool background gradients for your UI? WebGradients is a free collection of 180 linear gradients that you can use as content backdrops in any part of your website. Easy copy CSS3 crossbrowser code and use it in a moment! We've also prepared a .PNG version of each gradient. As a bonus, there are packs for Sketch & Photoshop.